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Dozers and Crawlers

Caterpillar D7 17a steering clutch

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Old 07-10-2012, 12:55:21 AM
Rattletrack Rattletrack is offline
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Default Caterpillar D7 17a steering clutch

I have a Cat D7 17a only one of the left steering clutch works the right tack locks in and drives but wont turn when you hit the brack on that side it acts like it lugs a lil but wont turn clutch just isnt disengaging any ideas
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Old 07-10-2012, 02:11:49 AM
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Toesmack Toesmack is offline
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Default Re: Caterpillar D7 17a steering clutch

Sorry, but just to help me get a clear picture. The left hand clutch and left steering brake work OK? The right brake provides some drag, but clutch just won't disengage, is this correct? Do you have good power transfer thru both tracks? You can check this by dropping the blade, and apply downforce til you stop the forward motion and create trackspin.

Next question, has this machine been in deep water or sitting for an extended period?

Does the clutch linkage feel the same on both sides? There is an adjustment for the mechanical linkage on each steering clutch. If the clutch arm does not stroke far enough, it won't let go.
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Old 07-10-2012, 11:28:17 PM
kfdutch kfdutch is offline
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Default Re: Caterpillar D7 17a steering clutch

Sounds like you need to adjust the right hand clutch?????
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Old 07-11-2012, 11:18:20 PM
Oilpulled Oilpulled is offline
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Default Re: Caterpillar D7 17a steering clutch

If a steering clutch does not release when the tractor has been setting for a long time, but it worked when last used, the steering clutch plates could be stuck together. You can break it loose usually by: Release both steering clutches and tie them back. Run the engine. Shift to low with main clutch released. Apply the brake on the stuck side. Engage the main clutch, jerking if necessary. It will try to stall the engine if the steering clutch is stuck. When it breaks free, then it is no longer stuck and the engine will not stall. You can slip it a little to scour off the rust.
Another cause is linkage which gets stuck. Then the steering clutch lever does not move freely. There is a little right angle bell crank which translates a forward pull to a sideways pull to release the steering clutch. That bell crank can get stuck. On my Cat 35 it was sold to me with one nonworking steering clutch. It was a stuck bell crank linkage, so stuck that it took 4 hours to just remove the bell crank. It has Hyatt type rollers and no way to get grease. There should be a stamped cover over the bell crank linkages. The seller was unhappy that he'd sold it with only that easy fix problem.
Another time the 35 had the first problem with clutch plates stuck together.
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